JP2003346342A - Optical disk drive and method for displaying disk - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an optical disk drive which records a part of a disk, when a disk closing process or a finalize process has been completed and permits to decide whether the disk is processed, by only viewing the recording surface and to provide a disk display method. <P>SOLUTION: The optical disk unit which performs recording and reproducing for a disk which accepts postscript, and has a user area 20 in which data is recorded, and a readout area 30 which is located at a periphery side of the user area 20, is characterized in that it is equipped with an optical pickup 65 recording the data in the user area 20 of the disk, and a CPU 90 for controlling the optical pickup 65 so as to record the prescribed data in the readout area 30, when it is instructed not to add other data different from these data in the disk as a postscript. <P>COPYRIGHT: (C)2004,JPO

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention uses a light beam,
The present invention relates to an optical disk device for recording and reproducing data on an optical disk, and more particularly, to an optical disk device and a disk display method for notifying a user of a recording state of an optical disk.

[0002]

2. Description of the Related Art Conventionally, as a medium of an optical disk for reproducing a music signal or a data signal, there is a compact disk (CD) which is widely used by consumers. In recent years, research on recording films of optical disk media has been actively promoted, and writable optical disks have been developed. On writable optical disks,
There are a phase change type in which the recording film is deformed by heat generated by the irradiation of the laser beam, and a so-called write-once type, in which recording pits are formed by burning out the recording film and recording is performed only once. The phase change type and the write-once type include, for example, DVD-R / RW disc, CD-R / R
There is a W disk and the like.

[0003] These DVD-R / RW and CD-R / RW
DVD-R / RW discs have a recording state called a disc closed state, and CD-R / RW discs have a recording state called a finalized state. When the disc is closed and finalized, additional writing or writing on the disc becomes impossible. . In other words, the disc closed state and the finalized state impose a restriction on the optical disc such that when a series of data signals are recorded on the disc, a new data signal cannot be added or written after the recorded data signal. is there.

Therefore, DVD-R / RW discs, CDs
A user cannot determine whether an R / RW disc or the like is in a recordable state or an optical disc in a write-disabled state after being closed or finalized by merely looking at the disc. For this reason, the user inserts the disc into a writable optical disc device and starts an application corresponding to writing on a DVD-R / RW or CD-R / RW disc to make a determination.

[0005]

SUMMARY OF THE INVENTION DVD-R / RW, C
Since the reflectivity of the recorded portion of the DR / RW disc changes, it is possible to determine the extent of the recording by looking at the recording surface of the disc, and it can be seen that an unrecorded area still remains. However, when the disc is closed or finalized, additional recording cannot be performed even if an unrecorded area remains.

When judging such a disk,
It is necessary to start up a personal computer, insert a disk into the optical disk device, start an application corresponding to writing of DVD-R / RW and CD-R / RW disk, and check whether the disk is writable. There was a problem that took time and effort.

Therefore, the present invention has been made to solve the above-mentioned problem, and records a part of a disc when the disc is closed or finalized.
It is an object of the present invention to provide an optical disk apparatus and a disk display method capable of determining whether or not a disk has been subjected to disk closing or finalization processing only by watching the recording surface.

[0008]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a recordable user data area having a user data area for recording data and a lead-out area located on the outer peripheral side of the user data area. In an optical disk device that performs recording and reproduction on a disk, a recording unit that records the data in the user data area of the disk, and when instructed not to add another data different from the data to the disk, Control means for controlling the recording means to record predetermined data in the lead-out area.

With the above arrangement, the user can instantly judge whether or not the disc has been subjected to the disc closing or finalizing process, just by looking at the recording surface of the disc, and use the standard lead-out area. Therefore, there is no need to change the standard.

[0010]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a block diagram showing a configuration of an optical disk device to which the present invention is applied.
Land tracks and groove tracks are formed spirally on the surface of an optical disk 61 as an optical recording medium, and the disk 61 is driven to rotate by a spindle motor 63. The optical disk 61 is assumed to be a writable disk such as a DVD-R / RW and a CD-R / RW disk.

Recording and reproduction of information on the optical disk 61 are performed by an optical pickup 65. The optical pickup 65 is connected to a sled motor 66 via a gear, and the sled motor 66 is controlled by a sled motor control circuit 68.

A speed detection circuit 69 is connected to the sled motor control circuit 68, and a speed signal of the optical pickup 65 detected by the speed detection circuit 69 is sent to the sled motor control circuit 68. A permanent magnet (not shown) is provided at a fixed portion of the thread motor 66. When the drive coil 67 is excited by the thread motor control circuit 68, the optical pickup 65 moves in the radial direction of the optical disk 61.

The optical pickup 65 is provided with an objective lens 70 supported by a wire or a leaf spring (not shown). The objective lens 70 can be moved in the focusing direction (the direction of the optical axis of the lens) by driving the drive coil 72, and can be moved in the tracking direction (the direction orthogonal to the optical axis of the lens) by driving the drive coil 71. It is.

The modulation circuit 73 is used by the host device 9 when recording information.
4 through the interface circuit 93 to perform, for example, 8-14 modulation (EFM) on the user data.
Provide M data. The laser control circuit 75 supplies the EF supplied from the modulation circuit 73 at the time of recording information (at the time of forming a mark).
A recording signal is provided to the semiconductor laser diode 79 based on the M data. Further, the laser control circuit 75 provides a reading signal smaller than the recording signal to the semiconductor laser diode 79 when reading information.

The semiconductor laser diode 79 generates a laser beam according to a signal supplied from the laser control circuit 75. Laser light emitted from the semiconductor laser diode 79 is irradiated onto the optical disk 61 via the collimator lens 80, the half prism 81, and the objective lens.
The reflected light from the optical disk 61 is guided to a photodetector 84 via an objective lens 70, a half prism 81, a condenser lens 82, and a cylindrical lens 83.

The photodetector 84 includes a four-divided photodetector cell 84.
a to 84d. Output signals of the photodetection cells 84a to 84d are supplied to differential amplifiers OP1 and OP2 via current / voltage conversion amplifiers 85a to 85d and adders 86a to 86d.
Supplied to

The differential amplifier OP2 includes adders 86a, 86
b, the focus error signal F corresponding to the difference between the two output signals
E is output. This output is output from the focusing control circuit 87.
Supplied to An output signal (focus control signal FC) of the focusing control circuit 87 is supplied to the focusing drive coil 72. As a result, control is performed such that the laser beam is always just focused on the recording film of the optical disk 61.

The differential amplifier OP1 includes adders 86c and 86
tracking error signal T corresponding to the difference between the two output signals
E is output. This output is supplied to the tracking control circuit 88. The tracking control circuit 88 generates a track drive signal according to the tracking error signal from the differential amplifier OP1.

The track drive signal output from the tracking control circuit 88 is applied to the drive coil 7 in the tracking direction.
1 is supplied. Further, a tracking error signal used in the tracking control circuit 88 is supplied to the sled motor control circuit 68.

By performing the focusing control and the tracking control, the sum signal of the output signals of the photodetector cells 84a to 84d of the photodetector 84, that is, the addition signal for adding both the output signals of the adders 86c and 86d. The change in the reflectance from the pits formed on the tracks of the optical disk 61 corresponding to the recorded information is reflected in the output signal of the optical unit 86e. This signal is supplied to the data reproducing circuit 78. The data reproduction circuit 78 reproduces the recorded data based on the reproduction clock signal from the PLL circuit 76.

When the objective lens 70 is controlled by the tracking control circuit 88, the objective lens 70 is
5 so that the thread motor 66 is positioned near the center position.
That is, the optical pickup 65 is controlled.

The motor control circuit 64, the sled motor control circuit 68, the laser control circuit 73, the PLL circuit 76, the data reproduction circuit 78, the focusing control circuit 87, the tracking control circuit 88, etc. are provided in one LSI chip as a servo control circuit. These circuits can be configured, and these circuits are controlled by the CPU 90 via the bus 89. CP
U90 comprehensively controls the optical disk device in accordance with an operation command provided from the host device 94 via the interface circuit 93. Also, the CPU 90
Using M91 as a work area, a predetermined operation is performed according to a program including the present invention recorded in ROM92.

Next, in order to make the embodiment of the present invention easy to understand, a description will be given with reference to FIGS. FIG.
2A shows the overall data structure of a CD-R disc, and FIG. 2B shows the data structure in a user area when data is recorded on the CD-R disc.

As shown in FIG. 2A, on the inner peripheral side of the optical disk 61, a lead-in area 10 in which identification information of the optical disk 61, information of a currently recorded position, and the like are recorded. A user area 20 on which data can be recorded is provided outside the in-area 10, and a lead-out area 30 indicating the end of the user area 20 is provided outside the user area 20.

FIG. 2B shows the data structure of the user area 20 when, for example, two separate data A and B are recorded on a CD-R disc. Data A is CD
When recording on the -R disc, first, the data A is recorded after the run-in 1a is recorded before the data A, and the run-out 1b is recorded after the data A is recorded.
The run-in 1a and the run-out 1b record their own address information and the like. Subsequently, when data B is additionally recorded, the link sector LS is recorded after the run-out 1b,
Further, after recording the run-in 2a, the data B is recorded, and the run-out 2b is recorded.

Here, when the user specifies via the host device 94 that data is no longer to be added after the data B, that is, when the finalizing process is specified, as shown in FIG. , A CD-R disc has a lead-out recorded after the run-out 2b. Based on the recorded lead-out, the optical disk device can determine whether the disk is a disk that has been finalized.

Although the description has been made with reference to a CD-R disc, a DVD-R disc may of course be a CD-R disc.
The same determination is made when an RW disc is used as a write-once disc.

FIG. 3 is a flowchart showing an operation state in which a write-once or writable optical disc is closed or finalized. Here, as an example, description will be made assuming that a new CD-R disc has been inserted into the optical disc device.

First, after a new CD-R disc 61 is inserted into the optical disc device (ST01), the host device 94 instructs the optical disc device to record data on the CD-R disc 61 based on a user's recording instruction. Issue a write command (ST03). The optical disk device starts recording data in the user area 20 of the CD-R disk 61 based on the write command (ST05). And
When the recording of this data is completed (Y in ST07),
Proceeds to the process of ST09, and if not completed (ST07
N) returns to ST05 to continue recording data. In the recording operation from the start to the end of the data, as described with reference to FIG. 2, the optical disc apparatus first records the run-in before recording the data, then records the data, and records the run-out to record the data. Recording ends.

In ST09, when the user designates the finalizing process via the host device 94 (ST09)
9) The CPU 90 controls the optical pickup 65 to record a lead-out for data after the run-out (ST11). Then, the CPU 90 moves the optical pickup 65 to the lead-out area 30 of the CD-R disc 61, and records predetermined data in the lead-out area 30 (ST13). The predetermined data may be, for example, sub-code data or data recorded in the user area 20, or “0” when read.
The data may be as follows. If the finalizing process is not specified (N in ST09), the process ends.

FIG. 4A is a diagram showing a disk state when a write-once or writable optical disk is subjected to a normal disk closing process or finalizing process.
FIG. 4B is a diagram showing a disk state when a disk closing process or a finalizing process is designated in the optical disk device of the present invention.

FIG. 4 (a) shows a state where the disc is closed or finalized when the user area 20 is recorded halfway, and the disc is closed or finalized while the user area 20 still remains. Then, the lead-out LO is recorded following the data recorded in the user area 20 without recording the lead-out area 30 originally defined in the standard. As described above, even if the user area 20 remains, if the disc is closed or finalized, the user cannot perform additional writing.

Referring to FIG. 4B, when the disc is closed or finalized, a lead-out LO is recorded following the data recorded in the user area 20 as in the conventional case, and the disc is defined by the disc standard. The read-out area 30 is also recorded. Therefore, when looking at the recording surface of this disc, it can be seen that the lead-out LO recorded after the data recorded in the user area 20 and the standard lead-out area 30 are recorded.

According to the above embodiment, when the CD-R disc 61 is inserted and the disc close or finalize process is designated by the user, not only the lead-out LO is recorded after the data to be recorded, but also the Lead-out area 30 originally defined in the standard
In this case, the user does not need to insert the disc into the optical disc apparatus and start a write-compatible application. The standard read-out area 30 is recorded on the recording surface of the disc. If it is known, it can be determined that the disc cannot be added.

Although a CD-R disc has been particularly described here, a DVD-R disc can of course be recorded in a standard lead-out area.
In the case of -RW discs and DVD-RW discs, when used as write-once discs, the lead-out area can be recorded by the above-described method.

It should be noted that the present invention is not limited to the above-described embodiment, and that various modifications can be made in the implementation stage without departing from the scope of the invention.

[0037]

As described above, when the user specifies the disc closing or finalizing processing, the user records the predetermined data in the lead-out area defined in the standard, so that the user can obtain the reflectance from the recording surface of the disc. It is possible to determine at a glance whether or not the disc has been closed or finalized, and there is no need to start a write-compatible application.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of an optical disc device according to an embodiment of the present invention.

FIG. 2A is a diagram illustrating an overall data structure of a CD-R disc, and FIG. 2B is a diagram illustrating a data structure in a user area when data is recorded on the CD-R disc; (C) is a diagram showing a data structure in the user area when the disc is closed or finalized when data is recorded on a CD-R disc.

FIG. 3 is a flowchart showing an operation state in which a write-once or writable optical disk is subjected to a disk closing process or a finalizing process.

FIG. 4A is a diagram showing a disc state when a write-once or writable optical disc is subjected to a normal disc closing process or a finalizing process, and FIG.
FIG. 8 is a diagram showing a disk state when a disk closing process or a finalizing process is designated in the optical disk device of the present invention.

[Explanation of symbols]

61 Optical Disk 63 motor 69 Tilt control circuit 70 Objective lens 71, 72 Lens drive coil 79 Laser Diode 80 Collimator lens 81 Half Prism 82 condenser lens 83 cylindrical lens 84a-84d Photodetection cell

Claims (6)

[Claims] 1. A user data area for recording data,
In an optical disc apparatus for recording and reproducing data on and from a recordable disc having a lead-out area located on the outer peripheral side of the user data area, recording means for recording the data in the user data area of the disc; An optical disc device, comprising: a control unit that controls the recording unit to record predetermined data in the lead-out area when an instruction not to add another data different from the data is received. 2. The optical disk device according to claim 1, wherein the lead-out area indicates an area defined in a standard. 3. The optical disk device according to claim 1, wherein the control means controls the recording of the predetermined data in the lead-out area when the data is additionally recorded on a rewritable disk. 4. A user data area for recording data,
In a disc display method of an optical disc apparatus for recording and reproducing on a recordable disc having a lead-out area located on the outer peripheral side of the user data area, a step of recording the data in the user data area of the disc, Controlling the recording of predetermined data in the lead-out area when receiving an instruction not to additionally write another data different from the data on the disk. 5. The disc display method according to claim 4, wherein the lead-out area indicates an area defined in a standard. 6. The disc display method according to claim 4, wherein said control means controls to record said predetermined data in said lead-out area when said data is additionally recorded on a rewritable disc. .